Book excerpt: The author's aim has been to draw together the threads of political and social science and of sub-specialisms within those broad areas of study and to interpret them in the context of urban and regional planning. Consideration is given to various interpretations of decision making in a democracy, to 'representation' and the public interest, to the opportunities for citizen participation in the planning process, to the range of potential participants, their motivation and competence, to the means which may be employed to secure different levels of citizen involvement; and to the impediments to meaningful participation. Therefore this book will contribute to the closing of the existing gap between theory and practice by drawing together a diversity of themes from political science, philosophy and psychology, community theory and regional science, rendering them comprehensible in the context of planning